I am having some difficulties positioning a series of GeoTIFF images properly in MapWindow GIS (which is a tool I just heard about, so I'm new to it). I have attached one of the Tiffs (Test_Tiff.zipx, not .zip) and some other reference files if you'd like something to work with.
Basically, my problem is this. I have a series of about 800 Tiffs that are supposed to be positioned around Lubbock, TX, but instead, they wind up at crazy impossible coordinates (227,000 Lat, 3.71 million Lon).
I have two separate viewers that position them correctly on the surface of the earth, but they aren't as capable at manipulating the way the images look as MapWindow (and one of the two tools skews the images in relation to each other, even though they are positioned correctly in general).
Each image is 1001x1001 pixels, and contains actual projection information in metadata. They are coordinate mapped based on Eastings and Northings in Meters in UTM Zone 14N. The problem is I also have a series of Shapefiles that I need to overlay on these Tiffs, with coordinates in DD and DMS.
I just haven't been able to figure out how to match these files up correctly in MapWindow.
The first reference file (*.gtf, just open it in Notepad) is the header information pulled by listgeo:
Geotiff_Information: Version: 1 Key_Revision: 1.0 Tagged_Information: ModelTiepointTag (2,3): 0 0 0 227000 3711000 0 ModelPixelScaleTag (1,3): 1 1 0 End_Of_Tags. Keyed_Information: GTModelTypeGeoKey (Short,1): ModelTypeProjected GTRasterTypeGeoKey (Short,1): RasterPixelIsArea GTCitationGeoKey (Ascii,33): "UTM Zone 14, Northern Hemisphere" GeogCitationGeoKey (Ascii,7): "WGS 84" GeogAngularUnitsGeoKey (Short,1): Angular_Degree ProjectedCSTypeGeoKey (Short,1): PCS_WGS84_UTM_zone_14N ProjLinearUnitsGeoKey (Short,1): Linear_Meter End_Of_Keys. End_Of_Geotiff. PCS = 32614 (name unknown) Projection = 16014 () Projection Method: CT_TransverseMercator ProjNatOriginLatGeoKey: 0.000000 ( 0d 0' 0.00"N) ProjNatOriginLongGeoKey: -99.000000 ( 99d 0' 0.00"W) ProjScaleAtNatOriginGeoKey: 0.999600 ProjFalseEastingGeoKey: 500000.000000 m ProjFalseNorthingGeoKey: 0.000000 m GCS: 4326/WGS 84 Datum: 6326/World Geodetic System 1984 Ellipsoid: 7030/WGS 84 (6378137.00,6356752.31) Prime Meridian: 8901/Greenwich (0.000000/ 0d 0' 0.00"E) Projection Linear Units: 9001/metre (1.000000m) Corner Coordinates: Upper Left ( 227000.000, 3711000.000) Lower Left ( 227000.000, 3709999.000) Upper Right ( 228001.000, 3711000.000) Lower Right ( 228001.000, 3709999.000) Center ( 227500.500, 3710499.500)
The big problem seems to lie in the Corner Coords. Whenever I open any of these Tiff and then try to lay down a Shapefile with DD or DMS coords into the window as well, MapWindow uses these Corner Coords as Lat/Long values for the Tiffs, and places them in non-existant parts of the Earth.
The next file (*.geom, also open it in Notepad) is calculated metadata information by one of the two other viewers I'm using.
image0.band0.max_value: 65535.000000000000000 image0.band0.min_value: 1.000000000000000 image0.band0.null_value: 0.000000000000000 image0.central_meridian: -99.000000000000000 image0.datum: WGE image0.elevation_lookup_flag: 1 image0.ellipse_code: WE image0.ellipse_name: WGS 84 image0.entry: 0 image0.false_easting_northing: ( 500000.000000000000000, 0.000000000000000 ) image0.false_easting_northing_units: meters image0.hemisphere: N image0.ll_lat: 33.494723469820684 image0.ll_lon: -101.938415246642780 image0.lr_lat: 33.494978169349594 image0.lr_lon: -101.927664074791850 image0.lr_x: 1000.000000000000000 image0.lr_y: 1000.000000000000000 image0.major_axis: 6378137.000000000000000 image0.minor_axis: 6356752.314199999900000 image0.number_input_bands: 1 image0.number_lines: 1001.000000000000000 image0.number_output_bands: 1 image0.number_samples: 1001.000000000000000 image0.origin_latitude: 0.000000000000000 image0.pixel_scale_units: meters image0.pixel_scale_xy: ( 1.000000000000000, 1.000000000000000 ) image0.radiometry: 16-bit unsigned image0.tie_point_units: meters image0.tie_point_xy: ( 227000.500000000000000, 3710999.500000000000000 ) image0.type: ossimUtmProjection image0.ul_lat: 33.503731224142932 image0.ul_lon: -101.938719863520430 image0.ul_x: 0.000000000000000 image0.ul_y: 0.000000000000000 image0.ur_lat: 33.503986010194602 image0.ur_lon: -101.927967581017510 image0.zone: 14 number_entries: 1
As you can see, this program correctly converts the Corner Coords from the Tiff into appropriate DD coords. The Tiffs are placed in the correct positions relative to the earth and it doesn't seem to be a big issue.
The last reference file (*.zip, not .zipx) is just a piece of one of the shapefiles that should overlay this image (a bit NW of center).
I've tried a couple things, but being unfamiliar with the tool, I don't know if anything I've done would have really been of value. One thing I did attempt that I think is worth noting is I did try using the "GIS Tools" plugin to "Raster-->Reproject Grids" and setting it to "Projected-->WGS 84-->UTM Zone 14N" to see if that would help the tool recognize it, but it did not help.
Anyways, please help! Thank you :)
Even though I'm having a bit of a hiccup here, my overall impression of the tool is quite good.
(Note: I've painted over the pixel data in the Tiff itself to look like a bunch of scribbly lines on a gradient background. Don't be confused if that's what you see).
Attachments: Test_Tiff.zipx (164.3 KB) Test_Tiff.gtf (1.6 KB) Test_Tiff.geom (1.5 KB) Test_Track.zip (10.6 KB)